Description
Return second-minus-first and subtract temperatureCoefficient times temperatureDifference for the adjusted difference.
Forensic measurement calculations require a known calibration, geometric model and uncertainty convention. A converted length, ratio or residual describes the supplied measurements; it does not establish common origin, identity or evidentiary strength.
Return second-minus-first and subtract temperatureCoefficient times temperatureDifference for the adjusted difference.
When to use this tool
Use Glass Refractive Index Repeat Gap when you need an explicit image or physical-measurement term.
How to use the tool and how it works
- Enter firstIndex, secondIndex, temperatureDifference, temperatureCoefficient. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read rawDifference, temperatureAdjustedDifference. Use the output convention below.
Require positive refractive indexes. Return second-minus-first and subtract temperatureCoefficient times temperatureDifference for the adjusted difference.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| firstIndex | First Index | Required. Finite number; strictly above 0. |
| secondIndex | Second Index | Required. Finite number; strictly above 0. |
| temperatureDifference | Temperature Difference | Required. Finite number. |
| temperatureCoefficient | Temperature Coefficient | Required. Finite number. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| rawDifference | Raw Difference | Required. Finite number. |
| temperatureAdjustedDifference | Temperature Adjusted Difference | Required. Finite number. |
{
"input": {
"firstIndex": 1.51,
"secondIndex": 1.52,
"temperatureDifference": 2,
"temperatureCoefficient": 0.001
},
"output": {
"rawDifference": 0.010000000000000009,
"temperatureAdjustedDifference": 0.008000000000000009
}
}Limitations and assumptions
- Coefficient is index change per temperature unit on the declared sign basis. No material match, uncertainty decision, temperature model, or forensic identification is established.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use the validated measurement method and original evidence for interpretation. Include calibration, geometry, uncertainty and the full evidentiary context rather than turning a numerical match into an identification.
References
Similar or alternative tools
- Forensic Interlaboratory Reference Delta
Return first-minus-second and divide by their hypotenuse.
- Forensic Balance Tare Uncertainty Term
Return gross-minus-tare and square root of max(0,uGross²+uTare²-2ρuGrossuTare).